Disk holder for disk sharpeners



jan. l?, 1933. D, Q GALViN 1,894,585

DISK HOLDER FOR DISK SHRPENERS Filed Dec. 29, 1950 y ,i5 5 13 "n" 3 33 l l 36 s' Patented Jan. 17, 1933 DFN'N'ISr C. GALVIN,. OF DES MOINES, IOWA DISK HOLDER FOR DISK SHARPENERS Application filed December 29, 1930. Serial No. 505,308.

The object of this invention is to provide yin a disk Sharpener of that type employing a pair' of yieldable pressure rolls adapted to roll or draw the periphery of the disk to a thin edge, an improved disk holder so constructed and arranged' that a disk may be firmly held in operative feedingvpositiom and at the same time easily and quickly adjusted to support disks of various shapes and diameters. f

More specifically it is the object ofthis invention to provide a disk holder adapted to be adjusted to a number of fixed positions so that theV drawing action of the rolls may be increased or decreased at the. will of the operator.

A further object is to provide in a disk holder of that type employing a rotatively mounted clamp adapted to support they central portion ofa diskl with one edge of the disk between the pressure rolls, improved means for adjusting the angle of the axis of the disk. clamp to. accommodate disks having different curvatures. andv different diameters, and in connection therewith means for easily and quickly making adjustments and firmly holding the disk7 in the desired operative position.

My invention consists in the construction, arrangement and combination of the various parts of the, device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out inmy claims, and illustrated in the accompanyingk drawing, in which:

Figure lisa side` elevation ener showing my improved plied thereto.

Figure 2 is an enlarged detail sectionalv view taken' onthe line 2 2 of- Figure 1.

Figure 3 isla detail sectional view taken on the line-.3-3 of Figure 2.

Figure 44 is a detailsectional- View taken on the line 4-4 of Figure 1. f

Figure 5 is a diagrammatical view showing the normal lateral position of the disk relative to the roller by dotted lines, and the disk adjustedl to itsv lateral position of movement by solid lines.

Referring to the. accompanying drawing,I

of a disk sharpdisk holder aphave used the numeral 10 to indicate generally what I shally term a support, which comprises legs 11, a base 12 and an upright frame member 13. The frame 13 is provided with bearings 14 and 15 which rotatively support shafts 16 and 17. Each of the shafts is` provided with a roller 18, one of the rollers being mounted above the other. rSaid rollers are designed to receive the periphery of a disk 19 between them, and to apply pressure in such manner that as the rollers are rotated, in opposite directions, the periphery of the disk will be drawn to a thin edge.

For supporting the disk in operative position, I have provided what I shall term a disk clamp comprising a head 20 having a downwardly and inwardly extending shaft 21 rotatively mounted in a suitable bearing 22. The upper end of the headA 2O is r0- vided with a screw threaded bolt 23 having suitable washers 24 by means of which the diskk 19 may be clamped between the outer end of the head 20 and said washer 24, the washer passing through ak central opening 25 of said disk. o

Normally the center of the shaft 21 is supported in a plane common to both of the axes of the shafts 16 and 17, with the shaft 21 inclined downwardly and inwardly, as clearly shown in Figure For supporting the bearing member 22 at various angles and in various positions to accommodate disks of dierent diameters, and of different curvatures, I have providedr the following mechanism:

Secured to the upright frame member 13 is a head bar 26 designed to support a pair of vertically arranged and rotatively mounted adjusting rods 27. The upper ends of the rods 27 are provided with square portions 28 for receiving a wrench. The lower ends of the rods 27 are screw threaded and each designed to support brackets 29 spaced apart and supported on opposite sides of the lower roller 18. The threaded portions of the rods 27are threaded in inwardly projecting lugs 30, so that as said rods are rotated in one direction, the bracket members will be elevated, and when rotated in the opposite direction thebracket members will be lowered.

`55 29 by means of the threaded rods 27.

Supported in the lower ends of the brackets 27 is a guide rod 31 designed to slidably and pivotally support the inner end of what-I shall term an upper frame member 32. Said frame member has side members 33, each having a longitudinally extending groove 34. The members 33 are connected at their outer ends by means of a cross member 35 and connected at their inner ends by means of a cross member 36.

Slidably mounted in the grooves 34 of the frame 32 is a block 37 designed to support the bearing member 22. Said block 37 has a downwardly extending lug 38 in which is threaded a rod 39. The inner end of the rod 39 is rotatively mounted in the bar 36 and the outer end in a suitable bearing carried by the bar 35. Collars 40 are provided to prevent longitudinal movement of the shaft relative '20 to the frame 32.

Secured to one of the base members 12 is a pair of upwardly projecting brackets 41, spaced apart and designed to carry a guide rod 42. Said guide rod is designed to pivotally and slidably support the inner end of what I shall term a lower frame member 43. Said frame member 43 has downwardly projecting flanges 44 designed to travel in grooves 45 formed in the frame member 46, one end of which is pivotally connected to the outer end of the frame member 32 by means of pivots 47.

The frame member 43 has a downwardly extending lug 48 for supporting a screw threaded shaft 49, the lower end of which is rotatively mounted in a cross member 50 carried by the frame member 46 and slidably mounted adjacent to the under surface of the frame 43. The upper end of the frame 46 has a cross member 50 in which the upper end of the shaft 49 is rotatively mounted. Collars 51 are provided for preventing longitudinal movement of said shaft 49 relative to the frame 46.

By this arrangement it will be seen that rotation of the shaft 49 will cause the frame member 46 to travel longitudinally in the frame member 43, and the outer end of the frame member 32 to be elevated and lowered, which in turn will cause the angle of the shaft 21 to be varied.

Rotation of the shaft 39 will cause the block 37 to be moved longitudinally of the frame member 32 and the disk clamp to be moved toward or from the end ofthe rollers 18 to accommodate disks of various diameters.

An adjustable brace bar 52 is provided, one end of which is pivotally connected with the jointed ends of the frame members 32 and 46, and the other end of the brace is pivotally connected to one of the legs 11 by means of a pivot supporting block 53. Further adjust- ,ment of the frame member 32 may be accomplished by raising and lowering the brackets The various adjustments are made after the disk 19 has been fixed to the clamp 20 to permit the periphery of the disk to enter between the rolls 18.

Normally the shaft 21 is supported in a common plane with the center of both of the shafts 16 and 17. Sometimes it is desirable to shift the frame members 32 and 43 laterally on the guides 36 and 42 to increase or decrease the drawing effect between the rollers and the periphery of the disk. This lateral adjustment is accomplished by means of screw threaded bolts 54 mounted in the lower ends of the brackets 19.

If the disk clamp is adjusted laterally in one direction, then the tendency to feed the disk radially is increased, while if the disk clamp is shifted in the opposite direction, then the tendency to feed the disks radially between the rollers is decreased. In practice, the disk clamp is usually shifted laterally to increase the radial feeding effect, as this has a tendency to draw the molecules of the periphery of the disk radially outwardly, thereby assisting rin drawing the periphery of the disk to a thin edge, and also causing a tension to be applied to the bearings of the shaft 21, in such a manner that vibration of the shaft in its bearings is entirely eliminated. This assists in rolling a true circular edge on the disk concentric with its center, even if the outer edge of the disk is worn unevenly or notched. Placing the disk under a drawing strain is of special advantage in sharpening disks having uneven or notched edges. It will be seen by referring to Figure 1 that the upper and lower fra-me members are of considerable width, so that any tendency toward the upper end of the disk clamp to swing laterally will be overcome.

The brace 52 also assists in rigidly supporting the outer ends of the pivot frame members.

In Figure 5 the disk 19 is shown in its l,

lateral position of movement by solid lines, and in such position as to cause radial drawing action if the said disk is being rotated in a counter-clockwise directionvby means of the rotating pressure rolls 18.

1l In Figure 4 a washer 55 is placed between the rollsi18 and the adj acentbearing niembers, to prevent oil escaping from the bearings of the shafts 16, and engaging thel periphery of the rollers, as any oil on the periphery of the pressure rolls decreases the feeding tendency of the rollers.

Thus it will be seen that I have provided a holder for disks which is particularly adapted to be used in connection with disk Sharpeners employing a set of pressure rolls, and when placed in operative position is capable of adjusting the disks to the desired position, and at the same time moving it laterally to increase or decrease the drawing action, and to ix the disk in saidlateral CTI ybetween said rolls,

position of movement at the will of the operator by means of set screws 54, in such a manner that after the device has been set, the operator may go about other work and allow the machine to automatically operate for a predetermined time, as the drawing alction of the pressure rolls is comparatively s ow.

It will further be seen that I have provided a holder which is capable of the necessary adjustments which rigidly and firmly hold the disk in operative position with the rollers, whereby a uniform tapered edge will be formed in the periphery of the disk.

I claim as my invention:

In combination, a support, a pair of coacting rolls, a disk clamp adapted to support a disk with a portion of its periphery between said rolls, av lower frame member having its inner' end pivoted and slidably connected to said support, an auxiliary frame member slidably mounted to move longitudinally of the lower frame member, an upper frame member having its outer end pivot` ally connected to the outer end of said auxiliary frame member and its inner end making pivotal and sliding connection with said support, a bearing block slidably mounted on said upper frame member, a disk clamp rotatively mounted on said block, means for adjusting the inner end of said upper frame member vertically, and means carried by the last said means for adjusting said upper frame member laterally.

2. The combination of a support, a pair of coacting rolls, a disk clamp adapted to support a disk with a portion of its periphery between said rolls, a pair of spaced brackets, means for adjusting said brackets vertically, a guide rod carried between said b-rackets, a frame member having one end pivotally and slidably mounted in said guide rod, a block slidably mounted longitudinally of said frame, means carried by said block for rotatively supporting said disk clamp, a lower frame member slidably and pivotally mounted to said support, an auxiliary frame member slidably mounted on the first frame member, the outer end of said auxiliary frame member being pivotally mounted to the outer end of the rst :trame member, means for adjusting the auxiliary frame member longitudinally of the lower frame member, means for adjusting said frame members laterally, and an radjustable brace having one end pivotally connected to the hinged ends of said frame members and its opposite end pivotally connected to said support.

3. In combination, a support, a pair of coacting rolls, a disk clamp adapted toy support a disk with a portion of its periphery a lower :trame member having its inner end pivoted and slidably connected to said support, an upper frame member having its outer end pivotally connected to the outer end of said lower frame member and its inner end making pivotal and sliding connection with said support, means carried by said upper frame member for carrying said disk clamp, means for adjusting the inner end of said upper frame member vertically, and means carried by the last said means :tor adjusting the upper end of said frame member laterally.

4. In combination, a support, a pair of coacting rolls, a disk clamp adapted to support a disk with a portion of its periphery between said rolls, a lower frame member having its inner end pivoted and slidably connected to said support, an upper frame member having its outer end pivotally connected to the outer end of said lower frame member and its inner end making pivotal and sliding connection with said support, means carried by said upper frame member for carrying said disk clamp, means for adjusting the inner end of said upper frame member vertically, means carried by the last said means for adjusting the upper end of said frame member laterally, and an adjustable brace having one end pivotally connected to the hinged end of said frame members and its opposite end pivotally connected t0 said support.

DENNIS C. GALVIN. 

